[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

From |
"Rijo John" <rmjohn@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: Help with loops |

Date |
Thu, 15 May 2008 16:33:13 -0500 |

Thanks Nick. It worked perfect. On Thu, May 15, 2008 at 4:03 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote: > Dots are not allowed in variable names. Period. > > So your code could read something like this: > > local varlist1 "var1 var2 var3 var4" > forval i = 1/3 { > foreach X of local varlist1 { > gen `X'_y`i' = `X'_y > replace `X'_y`i' = `X'_y + (`X'_y * `i'/100) > } > } > > It's not a good idea to loop over lists like 0.01 0.02 0.03, as sooner > or later precision problems will bite. I always loop over integers, and > do any arithmetic yielding fractions _inside_ the loop. > > Notice that I changed your outer loop to -forval-. That's a matter of > style, not syntax. > > Nick > n.j.cox@durham.ac.uk > > Rijo John > > I have the following that gives results the way I wanted. > > local varlist1 "var1 var2 var3 var4 " > foreach i in 1 2 3{ > foreach X of local varlist1{ > gen `X'_y`i'=`X'_y > replace `X'_y`i' = `X'_y+(`X'_y*`i') > } > } > > However, if I change values 1, 2, 3 to 0.01, 0.02 and 0.03 it gives me > the error saying "var1_y0.01 invalid name". As I understand variables > can not be named with dots in it? if so how do I get around? how can I > modify it to generate variabes such as var1_y1=var1-(var1_y*0.01) and > so on. > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Help with loops***From:*Rijo John <rmjohn@gmail.com>

**st: RE: Help with loops***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

- Prev by Date:
**Re: st: RE: Stata and R** - Next by Date:
**st: how to calculate marginal effects for themultiply imputed survey dataset** - Previous by thread:
**st: RE: Help with loops** - Next by thread:
**st: RE: Help with loops** - Index(es):

© Copyright 1996–2015 StataCorp LP | Terms of use | Privacy | Contact us | What's new | Site index |